TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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FIELD MAINTENANCE TORQUE LIMITS Scope This appendix provides the general torque limits for fasteners used on the 6V53/6V53T Diesel Engines. Special torque limits are indicated in the maintenance procedures for applicable components. These general torque limits cannot be applied to fasteners that retain rubber components. The rubber components will be damaged before the torque limit is reached. This appendix lists the dry torque limits. Dry torque limits are used on fasteners that do not have lubricants applied to the threads. No wet torques are given because all wet torques are listed in the maintenance procedure. Refer to Table 1 for torques suitable for grade 5, 5.1, 7, and 8 fasteners. No grade 1 or 2 fasteners are used on the 6V53/6V53T Diesel Engine Series. How to Use the Torque Table Measure the shaft diameter of the fastener and count the number of threads per inch. Under the heading thread size, look down the column until you find the diameter and threads per inch of the fastener. Next, look across that row and read the torque limit in lb-ft or N·m. Table 1. Torque Limits for Dry Fasteners. THREAD SIZE (INCHES- THREADS PER INCH) TORQUE LIMIT (lb-ft) TORQUE LIMIT (N·m) 1/4-20 7–9 10–12 1/4-28 8–10 11–14 5/16-18 13–17 18–23 5/16-24 15–19 20–26 3/8-16 30–35 41–47 3/8-24 35–39 47–53 7/16-14 46–50 62–68 7/16-20 57–61 77–83 1/2-13 71–75 96–102 1/2-20 83–93 113–126 9/16-12 90–100 122–136 9/16-18 107–117 146–159 5/8-11 137–147 186–200 5/8-18 168–178 228–242 TM 9-2815-205-24 0082 0082-1